Surface organometallic chemistry on zeolites: control of the pore opening of mordenite by grafting of thermally stable GeBu3 fragments

Christophe Nédez; Agnès Choplin; Judith Corker; Jean Marie Basset; Jean François Joly; Eric Benazzi

doi:10.1016/0304-5102(94)00087-5

Surface organometallic chemistry on zeolites: control of the pore opening of mordenite by grafting of thermally stable GeBu₃ fragments

Christophe Nédez, Agnès Choplin, Judith Corker, Jean Marie Basset^*, Jean François Joly, Eric Benazzi

^*Corresponding author for this work

Research output: Contribution to journal › Letter › peer-review

12 Scopus citations

Abstract

GeBu₄ reacts at 250°C with the external silanols of two different mordenites (Si/Al = 11 or 40) to give the surface organometallic complex SiOGeBu₃ 1 which has been characterized by ¹³C CP-MAS NMR; 1 is able to discriminate sterically different alkanes such as n-hexane, 2-methyl-pentane, 2,3-dimethyl butane, 2,2,4-trimethyl pentane. Such discrimination is parallel to that already observed for SiOSnBu₃ grafted on the same mordenites. Interestingly and in contrast to the behaviour of the grafted tin complex, 1 even after treatment at 400°C is still able to separate n-hexane from isooctane, a property ascribed to a steric molecular control of the Ge(Bu)₃ fragment which has an exceptional thermal stability.

Original language	English (US)
Pages (from-to)	L239-L244
Journal	Journal of molecular catalysis
Volume	92
Issue number	3
DOIs	https://doi.org/10.1016/0304-5102(94)00087-5
State	Published - Sep 13 1994
Externally published	Yes

Keywords

Germanium
Grafting
Mordenite
Pore opening
Surface chemistry
Tributylgermanium fragments
Zeolites

ASJC Scopus subject areas

General Engineering

Access to Document

10.1016/0304-5102(94)00087-5

Cite this

@article{7a6c81bcbf9641da87ce8b39c8e0a4b0,

title = "Surface organometallic chemistry on zeolites: control of the pore opening of mordenite by grafting of thermally stable GeBu3 fragments",

abstract = "GeBu4 reacts at 250°C with the external silanols of two different mordenites (Si/Al = 11 or 40) to give the surface organometallic complex SiOGeBu3 1 which has been characterized by 13C CP-MAS NMR; 1 is able to discriminate sterically different alkanes such as n-hexane, 2-methyl-pentane, 2,3-dimethyl butane, 2,2,4-trimethyl pentane. Such discrimination is parallel to that already observed for SiOSnBu3 grafted on the same mordenites. Interestingly and in contrast to the behaviour of the grafted tin complex, 1 even after treatment at 400°C is still able to separate n-hexane from isooctane, a property ascribed to a steric molecular control of the Ge(Bu)3 fragment which has an exceptional thermal stability.",

keywords = "Germanium, Grafting, Mordenite, Pore opening, Surface chemistry, Tributylgermanium fragments, Zeolites",

author = "Christophe N{\'e}dez and Agn{\`e}s Choplin and Judith Corker and Basset, {Jean Marie} and Joly, {Jean Fran{\c c}ois} and Eric Benazzi",

year = "1994",

month = sep,

day = "13",

doi = "10.1016/0304-5102(94)00087-5",

language = "English (US)",

volume = "92",

pages = "L239--L244",

journal = "Journal of molecular catalysis",

issn = "0304-5102",

publisher = "Elsevier BV",

number = "3",

}

TY - JOUR

T1 - Surface organometallic chemistry on zeolites

T2 - control of the pore opening of mordenite by grafting of thermally stable GeBu3 fragments

AU - Nédez, Christophe

AU - Choplin, Agnès

AU - Corker, Judith

AU - Basset, Jean Marie

AU - Joly, Jean François

AU - Benazzi, Eric

PY - 1994/9/13

Y1 - 1994/9/13

N2 - GeBu4 reacts at 250°C with the external silanols of two different mordenites (Si/Al = 11 or 40) to give the surface organometallic complex SiOGeBu3 1 which has been characterized by 13C CP-MAS NMR; 1 is able to discriminate sterically different alkanes such as n-hexane, 2-methyl-pentane, 2,3-dimethyl butane, 2,2,4-trimethyl pentane. Such discrimination is parallel to that already observed for SiOSnBu3 grafted on the same mordenites. Interestingly and in contrast to the behaviour of the grafted tin complex, 1 even after treatment at 400°C is still able to separate n-hexane from isooctane, a property ascribed to a steric molecular control of the Ge(Bu)3 fragment which has an exceptional thermal stability.

AB - GeBu4 reacts at 250°C with the external silanols of two different mordenites (Si/Al = 11 or 40) to give the surface organometallic complex SiOGeBu3 1 which has been characterized by 13C CP-MAS NMR; 1 is able to discriminate sterically different alkanes such as n-hexane, 2-methyl-pentane, 2,3-dimethyl butane, 2,2,4-trimethyl pentane. Such discrimination is parallel to that already observed for SiOSnBu3 grafted on the same mordenites. Interestingly and in contrast to the behaviour of the grafted tin complex, 1 even after treatment at 400°C is still able to separate n-hexane from isooctane, a property ascribed to a steric molecular control of the Ge(Bu)3 fragment which has an exceptional thermal stability.

KW - Germanium

KW - Grafting

KW - Mordenite

KW - Pore opening

KW - Surface chemistry

KW - Tributylgermanium fragments

KW - Zeolites

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U2 - 10.1016/0304-5102(94)00087-5

DO - 10.1016/0304-5102(94)00087-5

M3 - Letter

AN - SCOPUS:0028498034

SN - 0304-5102

VL - 92

SP - L239-L244

JO - Journal of molecular catalysis

JF - Journal of molecular catalysis

IS - 3

ER -